transcode impl but broken

2 files changed, 37 insertions, 0 deletions

diff --git a/remuxer/src/lib.rs b/remuxer/src/lib.rs
index 9ddf7c1..c20197f 100644
--- a/remuxer/src/lib.rs
+++ b/remuxer/src/lib.rs
@@ -3,9 +3,11 @@
     which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
     Copyright (C) 2025 metamuffin <metamuffin.org>
 */
+#![feature(random, exit_status_error)]
 pub mod extract;
 pub mod fragment;
 pub mod metadata;
+pub mod mpeg4;
 pub mod remux;
 pub mod seek_index;
 pub mod segment_extractor;
@@ -14,6 +16,7 @@ pub mod trim_writer;
 use ebml_struct::matroska::TrackEntry;
 pub use fragment::write_fragment_into;
 use jellymatroska::{Master, MatroskaTag};
+pub use mpeg4::matroska_to_mpeg4;
 pub use remux::remux_stream_into;
 
 pub fn ebml_header(webm: bool) -> MatroskaTag {
diff --git a/remuxer/src/mpeg4.rs b/remuxer/src/mpeg4.rs
new file mode 100644
index 0000000..9e59514
--- /dev/null
+++ b/remuxer/src/mpeg4.rs
@@ -0,0 +1,34 @@
+/*
+    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
+    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
+    Copyright (C) 2025 metamuffin <metamuffin.org>
+*/
+use anyhow::Result;
+use std::{
+    fs::{remove_file, File},
+    io::{copy, Read, Write},
+    process::{Command, Stdio},
+    random::random,
+};
+
+pub fn matroska_to_mpeg4(
+    mut input: impl Read + Send + 'static,
+    mut output: impl Write,
+) -> Result<()> {
+    let path = format!("/tmp/jellything-tc-hack-{:016x}", random::<u64>());
+    let args = format!("-f matroska -i pipe:0 -c copy -map 0 -f mp4 {path}");
+    let mut child = Command::new("ffmpeg")
+        .args(args.split(" "))
+        .stdin(Stdio::piped())
+        .stderr(Stdio::inherit())
+        .spawn()?;
+
+    let mut stdin = child.stdin.take().unwrap();
+    copy(&mut input, &mut stdin)?;
+    drop(stdin);
+    child.wait()?.exit_ok()?;
+    copy(&mut File::open(&path)?, &mut output)?;
+    remove_file(path)?;
+
+    Ok(())
+}